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2. Considerations for Proper Operation
◆ 2.1
Input Power Considerations
(1) The UPS version should match the AC line voltage (208, 220, 230 or 240 VAC ±15%,
and 50 or 60 Hz ±5%). Specific voltages and corresponding versions are as follows:
(2) The current capability of the AC supply must meet the requirements of the UPS (0.9
kVA to 4.5kVA). However, the circuit breaker in the source distribution panel should
be rated one grade higher than the load demand.
(3) Install the breaker (2 Units Par.:15A, 3 Units Par.: 20A, 4 Units Par.: 30A, 5 Units
Par.: 30A) for the distribution board of the UL authorization.
◆ 2.2
Installation Considerations
(1) Carefully consider the leakage current when a leakage circuit breaker is installed at
the input side. The leakage current of the UPS system is maximum 9 mA (5 UPS
Units in parallel).
(2) Keep the UPS at least one meter away from CRT displays. Other devices which may
be sensitive to magnetic flux should be kept away from the UPS, as it emits a slight
amount of magnetic flux.
(3) The UPS utilizes a fan for forced-air cooling. Provide at least 20 cm(7.88in) clearance
at the front and back of the UPS to permit free airflow at the air intake and exhaust
vents. For maintenance purpose, a space of at least one meter (39.4in) in front and 50
cm (19.69in) in the back of the UPS is needed. See "§6.3 Installation Space" for
details.
(4) If the AC source has one side grounded, the N terminal (phase) of the UPS must be
the grounded phase.
(5) If possible, avoid grounding the output (load) side. If one side must be grounded, the
V terminal (phase) should always be the grounded phase (to avoid short-circuiting
power to ground).
◆ 2.3
Usage Considerations
(1) Never short-circuit the output terminals, or connect a load which draws short-circuit
current. Doing so causes protective functions or fuse opening to prevent output.
(2) Unsuitable load devices
Do not connect laser printers, plain paper fax machines, copy machines or overhead
projectors as load devices. Such devices typically include heating elements that draw
high current. This may cause an overload that could prevent battery backup
operation when an outage occurs, or damage the UPS.
(3) Power supply environment
If the UPS is used in an environment subject to long and frequent power outages
(more than once a week), the batteries may not receive sufficient charge, which could
result in foreshortened battery life and premature battery failure.
(4) If the UPS is not operated for 6 months or more, the battery may require charging
before use. Operate the UPS with no load for at least 20 hours once every 6 months.
(5) Insulation testing
Before testing indoor wiring insulation, shut down the UPS and disconnect the input
and output cables. Conducting an insulation test with the UPS connected may
damage electronic components such as the built-in arrester.
(6) The UPS is designed to be installed horizontally. However, if it must be installed
vertically, the left side should be the lower side (the indicators at the higher side),
and mounting brackets should be installed if needed.
For rack mounting, an optional mounting bracket is required. Please contact your
sales representative for details.
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